CN211807637U - Oil circuit structure with controllable molten rubber retreating function - Google Patents
Oil circuit structure with controllable molten rubber retreating function Download PDFInfo
- Publication number
- CN211807637U CN211807637U CN201922294301.0U CN201922294301U CN211807637U CN 211807637 U CN211807637 U CN 211807637U CN 201922294301 U CN201922294301 U CN 201922294301U CN 211807637 U CN211807637 U CN 211807637U
- Authority
- CN
- China
- Prior art keywords
- oil
- cavity
- glue
- glue injection
- hydraulic cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses an oil circuit structure with controllable molten glue retreating function, which comprises a charging barrel provided with a hopper, a nozzle arranged at one end of the charging barrel, a screw rod arranged in the charging barrel, a molten glue driving device and a hydraulic cylinder, wherein the molten glue driving device is used for driving the screw rod to rotate, so that plastic coming in from the hopper can move towards the direction of the nozzle under the spiral acting force of a spiral groove of the screw rod and is gradually melted; the hydraulic cylinder is internally provided with a glue injection piston fixed with the screw rod and used for dividing the hydraulic cylinder into a loosening cavity and a glue injection cavity, the glue injection cavity is communicated with a first oil way, the loosening cavity is communicated with a second oil way, the first oil way is provided with a first overflow valve for adjusting the passive outflow pressure of hydraulic oil in the glue injection cavity, and the second oil way is provided with a second overflow valve for adjusting the active oil inlet pressure of the hydraulic oil in the loosening cavity, so that the hydraulic oil is actively pressed into the loosening cavity in the glue melting process, the friction force generated when the glue injection piston retreats is overcome, and the occurrence of the material ejection phenomenon is greatly reduced.
Description
Technical Field
The utility model relates to an injection moulding equipment technical field especially relates to an oil circuit structure with controllable melten gel retreats function.
Background
As shown in fig. 1, the melt glue return back pressure oil path system of the existing injection molding machine is passive, and comprises a material cylinder 1, a nozzle 2, a screw 3 and a hydraulic cylinder 4, wherein a glue injection piston 40 fixed with the screw 3 is arranged in the hydraulic cylinder 4, the glue injection piston 40 divides the hydraulic cylinder 4 into a release cavity 42 and a glue injection cavity 41, and during melt glue, the screw 3 is pushed to retreat by plastic in the material cylinder 1 so as to push the glue injection piston 40 to retreat (retreat along the direction opposite to the nozzle 2), that is, the glue injection piston 40 also retreats along the direction of the glue injection cavity 41; when the glue injection piston 40 retreats, the hydraulic oil in the glue injection cavity 41 passively flows out, the release cavity 42 passively absorbs oil, and a first relief valve 4100 is arranged on the hydraulic oil path in the glue injection cavity 41 to control the pressure (i.e. back pressure) of the plastic in the charging barrel 1 by controlling the hydraulic oil outflow pressure (the first relief valve 4100) of the glue injection cavity 41.
However, friction force is generated due to the backward movement of the glue injection piston 40, the actual pressure of the plastic during glue melting is the pressure generated by the hydraulic oil outflow pressure in the glue injection cavity 41 plus the friction force on the plastic, and when the hydraulic oil outflow pressure in the glue injection cavity 41 is set to zero, the actual pressure of the plastic is not zero, so that the plastic easily flows out of the nozzle 2 for the melt with relatively low viscosity (i.e. spitting phenomenon), thereby affecting the product.
SUMMERY OF THE UTILITY MODEL
To the deficiency of the prior art, an object of the utility model is to provide an oil circuit structure with controllable melten gel retreats function to greatly reduced melt outflow spouts the phenomenon of mouth (spitting material).
The purpose of the utility model is realized by adopting the following technical scheme:
an oil circuit structure with a controllable molten rubber retreating function comprises a charging barrel provided with a hopper, a nozzle, a screw, a molten rubber driving device and a hydraulic cylinder, wherein the nozzle is arranged at one end of the charging barrel, the screw is arranged in the charging barrel, and the molten rubber driving device is used for driving the screw to rotate, so that plastic coming in from the hopper can move towards the nozzle under the spiral acting force of a spiral hook groove of the screw and is gradually melted;
the hydraulic cylinder is internally provided with a glue injection piston fixed with the screw rod and used for separating the hydraulic cylinder so as to form a release cavity and a glue injection cavity in the hydraulic cylinder, the glue injection cavity is communicated with a first oil way, the release cavity is communicated with a second oil way, the first oil way is provided with a first overflow valve for adjusting the passive outflow pressure of hydraulic oil of the glue injection cavity, and the second oil way is provided with a second overflow valve for adjusting the active oil inlet pressure of the hydraulic oil of the release cavity so that the hydraulic oil is actively pressed into the release cavity in the glue melting process and the friction force generated when the glue injection piston retreats is overcome.
Furthermore, a first pressure gauge is arranged on the first oil way and used for monitoring the pressure value in the glue injection cavity.
Furthermore, a second pressure gauge is arranged on the second oil path and used for monitoring the pressure value in the loosening cavity.
Further, the glue melting driving device is a hydraulic motor.
Further, the hydraulic cylinder is an oil cylinder.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model discloses at the in-process of melten gel, through the second overflow valve with hydraulic oil initiative pressure in pine move back the chamber, overcome and penetrate gluey piston and retreat produced frictional force when retreating for hydraulic oil outflow pressure when penetrating gluey chamber sets for zero (first overflow valve), the melt substantial pressure in the feed cylinder is close to zero this moment (because frictional force has been offset), thereby reduces the material phenomenon of spitting out of low viscosity melt, and then makes more smooth and easy of melten gel.
Drawings
FIG. 1 is a schematic structural diagram of the background art of the present invention;
fig. 2 is a schematic structural diagram of the present invention.
In the figure: 1. a charging barrel; 10. a hopper; 2. shooting mouth; 3. a screw; 4. a hydraulic cylinder; 40. a glue injection piston; 41. a glue injecting cavity; 410. a first oil passage; 4100. a first overflow valve; 4101. a first pressure gauge; 42. loosening and withdrawing the cavity; 420. a second oil passage; 4200. a second overflow valve; 4201. and a second pressure gauge.
Detailed Description
In the following, the present invention is described with priority in conjunction with the accompanying drawings and the detailed description, and it should be noted that, in the premise of no conflict, the embodiments or technical features described below may be arbitrarily combined to form a new embodiment.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The implementation mode is as follows:
as shown in fig. 2, the utility model discloses an oil circuit structure with controllable melten gel function of retreating, including the feed cylinder 1 of installing hopper 10, penetrate mouth 2, screw rod 3, melten gel drive arrangement and pneumatic cylinder 4, penetrate mouth 2 and locate the one end of feed cylinder 1, screw rod 3 is located in the feed cylinder 1, melten gel drive arrangement is used for driving screw rod 3 rotatory, and this melten gel drive arrangement is hydraulic motor, makes the follow plastics that hopper 10 came can move to the direction of penetrating mouth 2 under the spiral effort of the spiral groove of screw rod 3 to progressively melt. It should be noted that the barrel 1 is of tubular construction, since the screw 3 generates a reaction force with increasing amounts of molten plastic in the front cavity of the barrel 1, thereby pushing the screw 3 back in the opposite direction to the nozzle 2.
The hydraulic cylinder 4 is internally provided with a glue injection piston 40 fixed with the screw rod 3 and used for separating the hydraulic cylinder 4 so as to form a release cavity 42 and a glue injection cavity 41 in the hydraulic cylinder 4, the hydraulic cylinder 4 is an oil cylinder, the glue injection cavity 41 is communicated with a first oil path 410, the release cavity 42 is communicated with a second oil path 420, and the first oil path 410 is provided with a first overflow valve 4100 for adjusting the passive outflow pressure of hydraulic oil in the glue injection cavity 41. When the screw 3 retreats in the direction opposite to the injection nozzle 2, the injection piston 40 fixed to the screw 3 also retreats in the direction along which the screw 3 moves, that is, the injection piston 40 retreats in the direction of the injection cavity 41, at this time, the hydraulic oil in the injection cavity 41 passively flows out, the release cavity 42 passively absorbs oil, and the pressure of the molten material in the cylinder 1 is controlled by controlling the pressure of the hydraulic oil flowing out of the injection cavity 41 through the first relief valve 4100.
And the back of the rubber injection piston 40 can generate friction force, the actual pressure of the molten material in the material cylinder 1 during the rubber melting is the hydraulic oil outflow pressure in the rubber injection cavity 41 plus the friction force generated when the rubber injection piston 40 backs, so that when the rubber injection piston 40 moves along the direction of the rubber injection cavity 41, the reaction force generated by the molten material in the front cavity of the material cylinder 1 is increased, and the molten material in the front cavity of the material cylinder 1 is forced to be ejected out towards the injection nozzle 2.
Therefore, the second relief valve 4200 is arranged on the second oil path 420 and used for adjusting the active oil inlet pressure of the hydraulic oil in the release cavity 42, so that the hydraulic oil is actively pressed into the release cavity 42 in the glue melting process, and the friction force generated when the glue injection piston 40 moves back is overcome. It can be understood that, the second relief valve 4200 actively presses the hydraulic oil into the releasing cavity 42 to overcome the friction force generated when the glue injection piston 40 moves backward, that is, the friction force generated when the glue injection piston 40 moves backward is offset by the set pressure of the second relief valve 4200, so that when the outflow pressure of the hydraulic oil of the glue injection cavity 41 is set to zero (the first relief valve 4100), the substantial pressure of the melt in the cylinder 1 is close to zero (because the friction force is already offset), and the effect of zero back pressure is achieved, thereby reducing the spitting phenomenon of the low-viscosity melt, making the melt smoother, and improving the plasticizing efficiency.
In order to facilitate to know the pressure value in the glue injection cavity 41, preferably, a first pressure gauge 4101 is disposed on the first oil path 410, the first pressure gauge 4101 is configured to monitor the pressure value in the glue injection cavity 41, and when the pressure value reaches a certain degree, a user observes the pressure value, so as to control the outflow pressure of the hydraulic oil in the glue injection cavity 41. Of course, in order to easily know the pressure value in the releasing cavity 42, it is preferable that the second oil path 420 has a second pressure gauge 4201 for monitoring the pressure value in the releasing cavity 42, and when the pressure value reaches a certain degree, a user observes the pressure value so as to control the oil inlet pressure of the releasing cavity 42.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (5)
1. An oil circuit structure with a controllable molten rubber retreating function comprises a charging barrel provided with a hopper, a nozzle, a screw, a molten rubber driving device and a hydraulic cylinder, wherein the nozzle is arranged at one end of the charging barrel, the screw is arranged in the charging barrel, and the molten rubber driving device is used for driving the screw to rotate, so that plastic coming in from the hopper can move towards the nozzle under the spiral acting force of a spiral hook groove of the screw and is gradually melted;
the hydraulic cylinder is internally provided with a glue injection piston fixed with the screw rod and used for separating the hydraulic cylinder so as to form a loose glue cavity and a glue injection cavity in the hydraulic cylinder, the glue injection cavity is communicated with a first oil way, the loose glue cavity is communicated with a second oil way, and the first oil way is provided with a first overflow valve for adjusting the passive outflow pressure of hydraulic oil in the glue injection cavity, and the hydraulic cylinder is characterized in that: and a second overflow valve is arranged on the second oil way and used for adjusting the active oil inlet pressure of hydraulic oil in the loosening cavity, so that the hydraulic oil is actively pressed into the loosening cavity in the glue melting process, and the friction force generated when the glue injection piston retreats is overcome.
2. The oil circuit structure with the controllable molten adhesive retreating function according to claim 1, characterized in that: and a first pressure gauge is arranged on the first oil way and used for monitoring the pressure value in the glue injection cavity.
3. The oil circuit structure with the controllable molten adhesive retreating function according to claim 1, characterized in that: and a second pressure gauge is arranged on the second oil path and used for monitoring the pressure value in the loosening cavity.
4. The oil circuit structure with the controllable molten adhesive retreating function according to claim 1, characterized in that: the glue melting driving device is a hydraulic motor.
5. The oil circuit structure with the controllable molten adhesive retreating function according to claim 1, characterized in that: the hydraulic cylinder is an oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922294301.0U CN211807637U (en) | 2019-12-18 | 2019-12-18 | Oil circuit structure with controllable molten rubber retreating function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922294301.0U CN211807637U (en) | 2019-12-18 | 2019-12-18 | Oil circuit structure with controllable molten rubber retreating function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211807637U true CN211807637U (en) | 2020-10-30 |
Family
ID=73032414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922294301.0U Active CN211807637U (en) | 2019-12-18 | 2019-12-18 | Oil circuit structure with controllable molten rubber retreating function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211807637U (en) |
-
2019
- 2019-12-18 CN CN201922294301.0U patent/CN211807637U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202742591U (en) | Rubber injection molding vulcanizing machine | |
| CN201720992U (en) | Fully electrical double-screw injection molding machine | |
| CN1139475C (en) | Failsafe shooting pot actuator for an injection molding machine | |
| CN211807637U (en) | Oil circuit structure with controllable molten rubber retreating function | |
| CN210820599U (en) | Injection molding machine with quantitative feeding function | |
| CN217073143U (en) | Quantitative feeding device of injection molding machine | |
| CN218701019U (en) | Large-glue-amount injection molding machine | |
| CN111002544A (en) | Storage cylinder of simple storage sealing glue for injection molding machine | |
| CN203994584U (en) | Leakproof pressure injection molding machine screw head | |
| CN204054546U (en) | A kind of Two-Stage Injection Device | |
| CN210100608U (en) | Compression injecting glue system of injection molding machine | |
| CN209666105U (en) | A kind of injection molding machine material injecting device | |
| CN210283127U (en) | Melting and glue injection integrated structure | |
| CN201471670U (en) | Rubber injection molding machine | |
| WO2016050002A1 (en) | Electro-hydraulic hybrid injection mechanism | |
| CN108454041A (en) | A kind of injection stopper head and glue injecting device | |
| CN110864137A (en) | Three-way valve structure for injection molding machine | |
| CN211868520U (en) | Injection molding machine for producing sealing gasket | |
| CN210791821U (en) | Injection molding machine is with first device of moulding plastics of controllable volume | |
| CN211145449U (en) | Three-way valve structure for injection molding machine | |
| CN103862644A (en) | Injection molding machine of automobile injection mould | |
| CN209478811U (en) | A kind of injection molding machine of convenient exhaust bubble | |
| CN204622510U (en) | A kind of injection machine automated injection device | |
| CN211807636U (en) | Storage cylinder of simple storage sealing glue for injection molding machine | |
| CN201848982U (en) | Injection device of screw injection molding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |